United, meanwhile, are seventh in the Premier League, 10 points adrift of fourth place and Champions League qualification.

Manager David Moyes has several selection concerns ahead of Tuesday's game, most notably in defence, where midfielder Michael Carrick filled in at centre-back during the
4-1 victory over Aston Villa on Saturday.

Left-back Patrice Evra is suspended while likely replacement Alexander Buttner is a doubt with a hamstring injury, as is right-back Rafael.

Central defenders Rio Ferdinand, Jonny Evans and Chris Smalling, the latter of whom has also played at right-back this season, have only recently recovered from injuries.

Striker Robin van Persie remains sidelined while January signing Juan Mata is cup-tied having played in the competition for Chelsea.

"We have defensive issues undoubtedly, we will have to make one or two changes," said Moyes. "We know that on our day we're as good a side as any but we have to show it more often."

Moyes added he was looking forward to pitting his wits against Bayern manager Pep Guardiola.

"It is the first time I have done, but I have no doubt I will be doing it many times in the future," said the Scot.

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